<template>
  <div>
    <!--面包屑导航区-->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!--卡片视图-->
    <!--卡片视图-->
    <el-card>
      <!--添加角色按钮区域-->
      <el-row>
        <el-col>
          <el-button type="primary">添加角色</el-button>
        </el-col>
      </el-row>
    </el-card>
    <!--角色列表的区域-->
    <el-table :data="roleList" border stripe>
      <!--展开列-->
      <el-table-column type="expand">
        <template slot-scope="scope">
          <el-row :class="['bdbottom',i1 === 0 ? 'bdtop' :'','vcenter' ]" v-for="(item1,i1) in scope.row.children"
                  :key="item1.id">
            <!--渲染一级权限-->
            <el-col :span="5">
              <el-tag closable
                      @close="removeRoleById(scope.row,item1.id)">{{item1.authName}}</el-tag>
              <i class="el-icon-caret-right"></i>
            </el-col>
            <!--渲染二级和三级权限-->
            <el-col :span="19">
              <!--通过for循环嵌套渲染二级权限-->
              <el-row :class="[i2 === 0 ? '' : 'bdtop','vcenter']" v-for="(item2,i2) in item1.children" :key="item2.id">
                <el-col :span="6">
                  <el-tag type="success" closable @close="removeRoleById(scope.row,item2.id)">{{item2.authName}}</el-tag>
                  <i class="el-icon-caret-right"></i>
                </el-col>
                <el-col :span="18">
                  <el-tag type="warning" v-for="(item3,i3) in item2.children" :key="item3.id" closable
                          @close="removeRoleById(scope.row,item3.id)">
                    {{item3.authName}}
                  </el-tag>
                </el-col>
              </el-row>
            </el-col>
          </el-row>
        </template>
      </el-table-column>
      <!--索引列-->
      <el-table-column type="index"></el-table-column>
      <el-table-column label="角色名称" prop="roleName"></el-table-column>
      <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
      <el-table-column label="操作" width="300px">
        <template slot-scope="scope">
          <el-button type="primary" icon="el-icon-edit" size="mini">编辑</el-button>
          <el-button type="danger" icon="el-icon-delete" size="mini">删除</el-button>
          <el-button type="warning" icon="el-icon-setting" size="mini" @click="showSetRightDialog(scope.row)">分配权限</el-button>
        </template>
      </el-table-column>
    </el-table>

    <!--分配权限的对话框-->
    <el-dialog
      title="分配权限"
      :visible.sync="setRightDialogVisible"
      width="50%" @close="setRightDialogClosed">
      <!--树形控件-->

      <el-tree :data="rightsList" :props="treeProps"
       show-checkbox node-key="id" default-expand-all :default-checked-keys="defKeys" ref="treeRef"></el-tree>
      <span slot="footer" class="dialog-footer">
    <el-button @click="setRightDialogVisible">取 消</el-button>
    <el-button type="primary"  @click="allotRights()">确 定</el-button>
  </span>
    </el-dialog>

  </div>
</template>

<script>
  export default {
    name: "Roles",
    data () {
      return {
        // 所有角色列表
        roleList: [],
        // 控制分配权限对话框显示与隐藏
        setRightDialogVisible:false,
        // 所有权限的数据
        rightsList:[],
        // 树形对象的属性绑定对象
        treeProps:{
          label:'authName',
          children:'children'
        },
        // 默认选中的节点ID值
        defKeys:[],
        // 当前即将分配权限的角色Id
        roleId: ''
      };
    },
    created () {
      this.getRolesList();
    },
    methods: {
      // 获取所有角色列表的方法
      async getRolesList () {
        const { data: res } = await this.$http.get("roles");
        if (res.meta.status !== 200) {
          return this.$message.error("获取角色列表失败");
        }

        // 成功的话
        this.roleList = res.data;
        console.log(this.roleList);
      },
      async removeRoleById (role, rightId) {
        // 弹框提示是否删除
        const confirmResult = await this.$confirm("此操作将永久删除该文件, 是否继续?", "提示", {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning"
        }).catch(error => error);
        if (confirmResult !== "confirm") {
          return this.$message.error("取消了删除");
        }
        const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`);
        if (res.meta.status !== 200) {
          return this.$message.error("删除权限失败！")
        }
        //
        role.children = res.data;
        this.$message.success("操作成功")
      },
      // 展示分配权限的对话框
      async showSetRightDialog(role){
        this.roleId = role.id;
        //获取所有权限的数据
        const {data :res} = await this.$http.get('rights/tree');
        if (res.meta.status !== 200){
          this.$message.error("获取权限失败!");
        }
        // 成功后
        this.rightsList = res.data;
        // 递归获取三级节点的ID
        this.getLeafKeys(role,this.defKeys);
        this.setRightDialogVisible = true;
      },
      // 通过递归的形式，获取角色下所有的三级权限的ID，并保存到defKeys数组中
      getLeafKeys(node,arr){
        // 如果当前节点不包含children属性，则是三级节点
        if (!node.children){
          return arr.push(node.id);
        }
        node.children.forEach(item => this.getLeafKeys(item,arr));
      },
      // 监听分配权限对话框的关闭事件
      setRightDialogClosed(){
        this.defKeys = []
      },
      // 点击为角色分配权限
      async allotRights(){
        const keys = [
            ...this.$refs.treeRef.getCheckedKeys(),
            ...this.$refs.treeRef.getHalfCheckedKeys()
        ]
        const idStr = keys.join(',');
        const {data : res} = await this.$http.post(`roles/${this.roleId}/rights`,{"rids":idStr});
        if (res.meta.status !== 200){
          this.$message.error("分配权限失败！")
        }
        this.$message.success("分配权限成功！");
        this.getRolesList();
        // 弹出框隐藏
        this.setRightDialogVisible = false;
      }
    }
  };
</script>

<style lang="less" scoped>
  .el-tag {
    margin: 7px;
  }

  .bdtop {
    border-top: 1px solid #eee;
  }

  .bdbottom {
    border-bottom: 1px solid #eee;
  }

  .vcenter {
    display: flex;
    align-items: center;
  }
</style>
